MDKSA-2000:073-1

Problem description

By adding specific headers to messages, the pine mail reader could be
made to exit with an error message when users attempted to manipulate
mail folders containing those messages.
Update:
The previous announcement did not make mention of another vulnerability
in pine 4.21 and previous in that it also contains a buffer overflow
vulnerability which allows a remote user to execute arbitrary code on
the local client by the sending of a specially-crafted email message.
The overflow occurs during the periodic "new mail" checking of an open
folder.